Relationship between Reaumuria soongorica Community Structure and Soil Quality of the Semiarid Loess Plateau, NW of China

2011 ◽  
Vol 183-185 ◽  
pp. 310-313 ◽  
Author(s):  
Bing Ru Liu
Keyword(s):  
Species Richness ◽  
Community Structure ◽  
Microbial Biomass ◽  
Soil Quality ◽  
Soil Nutrients ◽  
Soil Microbial Biomass ◽  
Plant Cover ◽  
Soil Nutrient ◽  
Soil Microbial ◽  
Reaumuria Soongorica

Reaumuria soongorica is the main dominant and constructive species of the desert shrub vegetation in the northwestern of China. The informations about changes in soil quality and vegetation structure togethor are available, which can provide valuable insights into the development of sustainable ecological systems that optimize production and maintain high environmental quality, but the variety of the plant community structure associate with dynamics of soil nutrient and microbial biomass are little known. In this study, five coverage levels of R. soongorica community were determined, while soil nutrients and microbial biomass were investigated. The results showed that the trends of plant species diversity (species richness) are ‘humped-back model’, soil organic carbon (SOC), total nitrogen (TN), soil microbial biomass C (MBC) and N (MBN) slightly increased with plant cover but not with plant species richness. MBC and MBN were positively correlated with SOC and TN (P<0.05), and plant cover showed positively correlated with soil nutrients and soil microbial biomass. It was concluded that vegetation restoration improved soil nutrient status and indirectly affected soil microbial biomass. However, the unilateral increase of vegetation cover will have less effect to soil quality.

scholarly journals Plant Biomass and Soil Nutrients Mainly Explain the Variation of Soil Microbial Communities during Secondary Succession on the Loess Plateau

2021 ◽  
Author(s):  
Miao-Ping Xu ◽  
Jia-Yi Wang ◽  
Xin-Hui Han ◽  
Cheng-Jie Ren ◽  
Gai-He Yang
Keyword(s):  
Microbial Biomass ◽  
Soil Nutrients ◽  
Soil Microbial Biomass ◽  
Plant Biomass ◽  
Soil Microbial Communities ◽  
Fungal Communities ◽  
The Loess Plateau ◽  
Soil Microbial ◽  
Plant Characteristics ◽  
Soil Bacterial

Abstract Soil microorganisms play an important role in the circulation of materials and nutrients between plants and soil ecosystems, but the drivers of microbial community composition and diversity remain uncertain in different vegetation restoration patterns. We studied soil physicochemical properties (i.e., soil moisture, bulk density, pH, soil nutrients, available nutrients), plant characteristics (i.e., Shannon index [HPlant] and Richness index [SPlant], litter biomass [LB], and fine root biomass [FRB]), and microbial variables (biomass, enzyme activity, diversity and composition of bacterial and fungal communities) in different plant succession patterns (Robinia pseudoacacia [MF], Caragana korshinskii [SF] and grassland [GL]) on the Loess Plateau. The herb communities, soil microbial biomass and enzyme activities were strongly affected by vegetation restoration. And soil bacterial and fungal communities were significantly different from each other at the sites. Furthermore, LB and FRB were significantly positively correlated with SBacteria, soil microbial biomass, enzyme activities, Proteobacteria, Zygomycota and Cercozoa, while negatively correlated with Actinobacteria and Basidiomycota. In addition, soil water content (SW), pH and nutrients have important effects on the bacterial and fungal diversities, Acidobacteria, Proteobacteria, Nitrospirae, Zygomycota and microbial biomass. Furthermore, plant characteristics and soil properties modulated the composition and diversity of soil microorganisms, respectively. Overall, the relative contribution of vegetation and soil to the diversity and composition of soil bacterial and fungal communities illustrated that plant characteristics and soil properties may synergistically modulate soil microbial communities. And soil bacterial and fungal communities mainly depend on plant biomass and soil nutrients.

scholarly journals Seasonal dynamics of soil microbial biomass C and N of Keteleeria fortunei var. cyclolepis forests with different ages

2019 ◽  
Vol 31 (6) ◽  
pp. 2377-2384
Author(s):  
Yong Wang ◽  
Xiongsheng Liu ◽  
Fengfan Chen ◽  
Ronglin Huang ◽  
Xiaojun Deng ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Seasonal Variation ◽  
Microbial Biomass ◽  
Soil Nutrients ◽  
Total Nitrogen ◽  
Soil Microbial Biomass ◽  
Soil Layer ◽  
Soil Layers ◽  
Soil Microbial ◽  
Young Forest

Abstract Soil microbial biomass is an important indicator to measure the dynamic changes of soil carbon pool. It is of great significance to understand the dynamics of soil microbial biomass in plantation for rational management and cultivation of plantation. In order to explore the temporal dynamics and influencing factors of soil microbial biomass of Keteleeria fortunei var. cyclolepis at different stand ages, the plantation of different ages (young forest, 5 years; middle-aged forest, 22 years; mature forest, 40 years) at the Guangxi Daguishan forest station of China were studied to examine the seasonal variation of their microbial biomass carbon (MBC) and microbial biomass nitrogen (MBN) by chloroform fumigation extraction method. It was found that among the forests of different age, MBC and MBN differed significantly in the 0–10 cm soil layer, and MBN differed significantly in the 10–20 cm soil layer, but there was no significant difference in MBC for the 10–20 cm soil layer or in either MBC or MBN for the 20–40 cm soil layer. With increasing maturity of the forest, MBC gradually decreased in the 0–10 cm soil layer and increased firstly and then decreased in the 10–20 cm and 20–40 cm soil layers, and MBN increased firstly and then decreased in all three soil layers. As the soil depth increased, both MBC and MBN gradually decreased for all three forests. The MBC and MBN basically had the same seasonal variation in all three soil layers of all three forests, i.e., high in the summer and low in the winter. Correlation analysis showed that MBC was significantly positively correlated with soil organic matter, total nitrogen, and soil moisture, whereas MBN was significantly positively correlated with soil total nitrogen. It showed that soil moisture content was the main factor determining the variation of soil microbial biomass by Redundancy analysis. The results showed that the soil properties changed continuously as the young forest grew into the middle-aged forest, which increased soil microbial biomass and enriched the soil nutrients. However, the soil microbial biomass declined as the middle-age forest continued to grow, and the soil nutrients were reduced in the mature forest.

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